How to show field in custom sales rule form based on value of another field - magento

Question

I want to display my custom field in sales rule form only if field simple_data (label Apply) is set to value by_percent. I added this xml in my module:
<?xml version="1.0" encoding="UTF-8"?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
<fieldset name="actions" sortOrder="30">
<field name="simple_action" formElement="select">
<settings>
<switcherConfig>
<rules>
<rule name="0">
<value>by_percent</value>
<actions>
<action name="0">
<target>sales_rule_form.sales_rule_form.actions.is_base_price_discount</target>
<callback>show</callback>
</action>
</actions>
</rule>
</rules>
</switcherConfig>
</settings>
</field>
<field name="is_base_price_discount" formElement="checkbox">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="source" xsi:type="string">sales_rule</item>
<item name="default" xsi:type="number">0</item>
<item name="sortOrder" xsi:type="number">20</item>
</item>
</argument>
<settings>
<dataType>boolean</dataType>
<label translate="true">Discount from base price</label>
<visible>true</visible>
<dataScope>is_base_price_discount</dataScope>
</settings>
<formElements>
<checkbox>
<settings>
<valueMap>
<map name="false" xsi:type="number">0</map>
<map name="true" xsi:type="number">1</map>
</valueMap>
<prefer>toggle</prefer>
</settings>
</checkbox>
</formElements>
</field>
</fieldset>
</form>
But it still appears with any option selected. How to set it correctly?
enter image description here